Question

In Triangle ABC, angle A measures 40 degrees. Give possible angle measures for B and C.

Answer 1

B = C = 70°

Explanation:

In Triangle ABC, angle A measures 40 degrees.

We need to find the possible angle measures for B and C if ABC is in isosceles triangle.

For an isosceles triangle, two sides of a triangle are equal. We know that if two sides are equal, the corresponding angles are equal. Let equal angles are x. The sum of an isosceles triangle is equal to 180 degrees. So,

40 + x +x = 180

40 + 2 x = 180

2x = 140

x = 70 degrees

So, the possible angle measures for B and C is equal to 70°.